Multiple beams antenna by RF delay line beam-forming network

In this paper the RF delay line is used as the beam-forming network to generate eight beams for giving antenna array aperture. There are eight beam patterns from the eight antenna elements in this MBA (Multiple Beams Antenna) system. The eight antenna elements are the coaxial collinear antennas with quarter wavelength above the ground plane. The beamwidth for these eight beams are changing from 10° to 15° with in the 70° azimuth sector coverage. The test results of the performances in this MBA are agreed with that of the simulations.